Hi Tam - in my, limited experience, they come and go I am afraid. I am only in my 4th week and to be honest didn't really get cravings until last week but like you I am 100% committed to staying on track.
As everyone on here says - distraction is key. Bath, book, walk, phone someone, etc - it is the reason all my ironing is up to date. I mean the bedding I washed this morning has been dried and ironed and put away - I must be in real need of distraction to iron a blooming king size duvet cover (both sides)!
I would be interested from those who are further down the diet to see if cravings do dissapear though!
You sound focussed on staying on the diet and you have already seen great results. Stay strong and you will get through them x